I've seen a few articles that have a list of “all the Easter Eggs” but aren't even close. Here's an attempt to catalog as many as possible

• Jump by Van Halen playing
• In Wade's hideout there's a Nintendo lunchbox (haven't managed to catch the game)
• There's also a crushed Carl's Jr cup
• There's a bunch of stickers near these but I've only made out the GSS sticker so far
• Entering the Oasis, we first see Minecraft World
• Henry and Em's house from The Wizard of Oz flying around in Hurricane World
• 1989 Batman climbing on Everest
• Planet Ludis flashes by, a reference from the book which is otherwise almost completely absent from the movie
• DC's The Flash
• Ray Harryhausen Cyclops from the 7th Voyage of Sinbad
• Borg? (off to the left of the cyclops)
• BattleToads?
• RoboCop
• Marvin the Martian
• Mortal Combat guy? Can't figure this one out - right before Parzival changes his hair
• Sonic the Hedgehog lining up for the gate
• Tracer from Overwatch
• Hello Kitty, Badte-Maru, and Keroppi
• First zooming in on Planet Doom, it looks like a battle between giant scorpions and pegasai possibly from Clash of the Titans?
• Freddy Kruger
• Duke Nukem
• Some kind of Smiley Face guy
• EM-1 Rail Gun from Eraser
• Blob?
• Raynor from StarCraft
• Donkey Kong Jr poster on the wall behind the girl
• Jason Voorhees
• Everybody Wants to Rule the World by Tears for Fears
• World of Warcraft female orc?
• There's a guy behind the orc that looks like one of the Daft Punk guys but he turns his head and it almost looks like a skull with a helmet on
• Doc Brown, back from the future outfit, Back to the Future
• Movie note: 1972 is the mint date on the quarter in focus on Halliday's right eye and is also Halliday's birthday. The quarters in the book were minted in 1984 but no reason is given for this date.
• In the funeral scene, Halliday is wearing a Simon pin on his lapel
• Halliday's funeral is a Star Trek themed funeral
• Halliday's casket is a MkII photon torpedo from Star Trek II which is draped with a flag of the Federation of Planets similar to how Spock's casket appeared at the end of the same movie.
• Halliday sits up in his casket - this seems to mimic Dracula sitting up in his coffin in the old Beli Lugosi Dracula movies but I can't find a reference

• I Hate Myself for Loving You by Joan Jett and the Blackhearts playing
• Mad Max's Ford Falcon XB Interceptor GT
• Batman 60s TV series customized Ford Lincoln Futura convertible
• Daito is driving Speed Racer's Mach 5
• Ryu from Street Fighter
• Red 1958 Plymouth Fury from Christine by Stephen King
• Movie note: Nolan is such a dick, his tie has “NS IOI” on it, his name and his company
• Aech's truck is a modified Bigfoot 3 (the monster truck) from 1984
• Parzival's car is the original (pre-future mods) Delorian time machine from Back to the Future but has KITT's “eye” on the front, mentioned in the book, only seen in the movie
• Art3mis' motorcycle is Kaneda's bike from AKIRA with Hello Kitty, Wonder Woman and The Greatest American Hero stickers on it
• Movie note: the race is a race to a modified Bethesda Terrace and Angel of the Waters statue and fountain at the northern end of Central Park
• Is the Formula One race car a reference?
• The A-Team's van is seen briefly
• Sho is driving a black Trans-Am, possibly Smokey and the Bandit?
• The semi that comes from a side street and blocks the race is The Porkchop Express, Jack Burton's truck from Big Trouble in Little China
• Movie marquee advertises “Schwarzenegger [as] Jack Slater” which is the in-movie fictional hero in Last Action Hero
• Tyrannosaurus Rex likely from Jurassic Park
• King Kong is hanging onto the top of the Empire State Building, classic scene from many of the older King Kong movies, while being buzzed by planes
• The Silvercup Studios sign - references are too many to list here

• Pee-wee's bike from Pee-wee's Big Adventure
• Iron Giant from the movie of the same name
• The Galactica from Battlestar Galactica
• Sulaco from Aliens
• Valley Forge from Silent Running
• The TARDIS
• Parzival mentions a Harkonnen dropship that can fold space (?) from Dune
• Eagle-5, Lone Starr's RV spaceship from Spaceballs
• The EVA pod from 2001: A Space Odyssey
• A Viper fighter from Battlestar Galactica
• Goldeneye videogame
• Hot Pockets
• A quote from the Superman movie
• Art3mis calls Parzival “McFly” before she disconnects, another reference to Back to the Future and possibly channeling Biff?

• Faith by George Michael playing
• Galaga? Galaxian? poster on the wall of the cafeteria
• Halliday wearing a Space Invaders t-shirt
• Parzival wearing what looks like a Han Solo gun belt with a ThunderCats logo on the buckle
• Parzival wears black Canvas Hightops sneakers
• I can't find a reference for the sword on the back of his denim vest - possibly just a reference to his namesake knight?
• Halliday says “Bill and Ted did it” referring to the main characters from Bill & Ted's Excellent Adventure
• Wade is wearing a t-shirt with a map of Camelot printed on it, another reference to his avatar's namesake

• Stand on It by Bruce Springsteen is playing
• Street Fighter with a Ryu avatar example
• Overwatch booth
• HALO booth
• Borderlands booth
• Dungeons & Dragons booth
• The Holy Hand Grenade from Monty Python and the Holy Grail
• Zemeckis Cube: this one is a twofer; Robert Zemeckis wrote and directed Back to the Future and was involved in the story and directed the other two movies in that series. The Cube is a reference to the original Rubik's Cube

• Movie note: Sorrento's password is “B055man69” or “bossman69” is leet speak. What a douche.
• Crashed Martian ship from War of the Worlds, 1953
• Perseus' shield from Clash of the Titans, 1981 version
• I-R0k says “I knew him well, Sorrento” after picking up the Steampunk Pirate King's skull which is a (mangled) reference to Shakespeare's Hamlet, Act 5, Scene 1
• The box holding the Orb of Osuvox is the box Gizmo came in from Gremlins
• The Orb of Osuvox is a icosahedron similar to a 20-sided dice in role playing games
• I-R0k refers to the old Tootsie Pop commercial with the owl

• Numerous articles from newspapers and magazines
• Nintendo Light Gun on the wall

• One Way or Another by Blondie playing
• Batman Arkham Knight
• Beetlejuice from the movie of the same name
• The Smiley Face guy that was killed on Planet Doom is back
• Injustice Supergirl
• Robot from I,Robot?
• Goro from Mortal Combat
• Laura Croft
• Batgirl
• Chestburster alien from Alien
• Clark Kent, secret identity of Superman; it's a reference to the dubious premise that he takes of the Superman suit and puts on glasses and no one recognizes him
• Appears to be Billy Idol's album Don't Stop from 1981 next to Halliday's computer
• All computers appear to be from Dell

• Cocktails & Dreams neon sign from the bar in Cocktails
• “Save Ferris” sticker from Ferris Bueller's Day Off
• Emulator II sampling syth from E-mu Systems, popular in the 80s
• Poster of Beastmaster on the wall next to the mirror
• Parzival is first wearing what kind of looks like Prince's Purple Rain outfit (but with white pants)
• Poster of Wil Wheaton on the wall on the other side of the mirror.
• Poster of Mad Max below Wil
• Poster of Big Trouble in Little China closer to the bar
• Parzival switches to Michael Jackson's red leather outfit from Thriller
• Space Invaders stickers on the post
• The red/pink hoverboard Marty hangs on to from Back to the Future II and III
• The “Re-Elect Mayor 'Goldie' Wilson” poster from Back to the Future
• Parzival switches to a Duran Duran outfit from their Rio photoshoot
• Parizival settles on the suit Buckaroo Banzai wears in the movie The Adventures of Buckaroo Banzai Across the 8th Dimension
• Poster of The Fly on the wall
• Movie note: the stairs seem to be an homage to the entrance to Aech's Lair from the book since we've already seen the main entrance is on the ground floor

• Blue Monday by New Order playing
• Lambda Class T-4a Imperial Shuttle from Star Wars: The Empire Strikes back and others
• UD-4 Cheyenne Dropship from Aliens
• The bartender is wearing a Devo hat
• Harley Quinn Arkhamverse version
• Stayin' Alive by the Bee Gees playing
• Music and dancing a reference to Staying Alive from 1983
• Tracer from Overwatch again
• Blastoise? Pokemon
• Joker and Harley Quinn
• Ate3mis' rifle is an Armat M41A Pulse rifle from Aliens
• When Parzival throws the Zemeckis Cube, a riff from Back to the Future plays

• Possible reference to MadBalls by Chromy
• Defender was a video arcade game from Williams Electronics, 1981
• The Millennium Falcon from … does this one really need to be explained?
• John Hughes directed many of the 80s teen adventure movies
• A reference to the schools on Ludis, again, a major plot in the books, barely in the movie
• Ridgemont refers to Fast Times at Ridgemont High directed by Amy Heckerling, 1982
• Faber is the college from National Lampoon's Animal House directed by John Landis, 1978
• Shermer High School is the high school in Ferris Bueller's Day Off, 1986 and The Breakfast Club, 1985
• TAB soda produced by Coke Company but not widely available anymore
• Robotron:2084 was a video arcade game from Williams Electronics, 1982
• Duran Duran the band from the 80s

• The Fly
• Say Anything
• The Shining
• The next scenes are all in a recreation of the Overlook Hotel from The Shining
• When they enter, the eerie organ music from the theme is playing
• Movie note: the picture on the wall have Halliday and Karen in it instead of Jack Torrance as seen at the end of the movie

• The patches on Helen's jacket: Battlestar Galactica, Wonder Woman, ThunderCats, The Last Starfighter, Dead Kennedys, Rocky Horror Picture Show,

Strap in, this one will be long…

• Atari 2600 from Atari, released in 1977, probably one of the most popular home video game consoles in the 80s
• The spell to activate the orb is from Excalibur, 1981